delete the unused variable 'codec'
delete the unused variable 'codec'

svn path=/trunk/KDE/kdepim/knode/; revision=1050556

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi